Ruler



FIG. 1 is front view of a ruler, showing my design;

FIG. 2 is a rear view showing my design;

FIG. 3 is a left view showing my design;

FIG. 4 is a right side view showing my design;

FIG. 5 is a top side view showing my design;

FIG. 6 is a bottom plan view showing my design; and,

FIG. 7 is a reference view thereof that the rule can be stretched.

CLAIM The ornamental design for a ruler, as shown and described.